[Android] Fix require(...) file resource on production (#429)

* Fix require(...) file resource on Android production

* Update example (use require for ./broadchurch.mp4)

* Fix MainApplication.java of example

* Add default source type

example/android/app/src/main/java/com/videoplayer/MainApplication.java

@@ -14,27 +14,17 @@ import java.util.List;
 
 public class MainApplication extends Application implements ReactApplication {
 
-    private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
-        @Override
-        protected boolean getUseDeveloperSupport() {
-            return BuildConfig.DEBUG;
-        }
-
-        @Override
-        protected List<ReactPackage> getPackages() {
-            return Arrays.asList(
-                    new MainReactPackage(),
-                    new ReactVideoPackage()
-            );
-        }
-    };
+  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
+    @Override
+    public boolean getUseDeveloperSupport() {
+      return BuildConfig.DEBUG;
+    }
 
     @Override
-
     protected List<ReactPackage> getPackages() {
-      return Arrays.<ReactPackage>asList(
-          new MainReactPackage(),
-          new ReactVideoPackage()
+      return Arrays.asList(
+        new MainReactPackage(),
+        new ReactVideoPackage()
       );
     }
   };